Nearly a decade after two catastrophic oil spills in the Niger Delta, a comprehensive cleanup has finally been launched in the southern Nigerian region.

Oil companies and activists hope it will be a blueprint for wider rehabilitation, but other badly polluted communities are unhappy not to be included.

Earlier this month, crews of young men equipped with high-pressure hoses began to attack the crude oil that has blighted the creeks and mangrove swamps in the area where they live.

The workers from Bodo in Rivers State are beginning a three-year project that claims to mark a new approach to cleaning up the delta, the vast polluted swampland that pumps the oil vital to Africa's largest economy.

Four hundred workers will clear dead foliage and spilled oil before planting new mangroves. The site where they are working is small, but organizers hope the anti-pollution drive can be repeated elsewhere in the delta.

Unlike cleanup operations run routinely by oil giant Royal Dutch Shell, this one is backed by local communities and teams of scientists who will take samples of water, mud and soil in each area to measure progress and determine the best cleaning method.

Funded by Shell and its joint venture partners, the cleanup is the culmination of years of legal wrangling and international pressure to overcome animosity and mutual suspicion that have divided locals, the government and oil companies.

Shell declined to say how much it was spending on the effort, whose leaders see it as a glimmer of hope in a benighted land where many wells are not safe to drink from and fishing and farming have been devastated.

FILE - This picture taken June 8, 2016, shows a waterway in the Niger Delta.

"The Niger Delta is at a crossroads," said Inemo Samiama, chairman of the Bodo Mediation Initiative (BMI), which is managing the cleanup. "We have a lot of polluted sites. We need something that we can refer to, some shining example."

Hope and pollution

The work of the BMI covers 10 square kilometers, a tiny fraction of the 70,000-square-mile Delta.

Niger Delta, Nigeria

As the workers walk through gnarled, dead mangrove roots in their protective gear and masks, oil seeps into their footprints — remnants of 2008 spills for which Royal Dutch Shell admitted responsibility.

Despite the optimism, environmentalists point out that at BMI's work rate, it will take 21,000 years to clean the entire delta, and that's not including the 10 years of legal battles it took to make it happen.

Communities in the other eight Delta states are also unhappy they have no cleanup plan, fueling the resentment that underpinned the militant movements that hit production last year and helped tip Nigeria into its first recession in 25 years.

Already one group, the Niger Delta Avengers, has threatened a return to violence. They say the government is not keeping its promises to clean up the delta and provide more jobs, money and infrastructure.

Other groups who do not advocate violence are also frustrated.

"No cleanup whatsoever has taken place," said Deinbo Owanaemi Emmanuel, attorney for the Bille kingdom, also in Rivers but outside the cleanup area. "People are dying. People are being denied justice."

FILE - Men walk in an oil slick covering a creek near Bodo City in the oil-rich Niger Delta region of Nigeria, June 10, 2010.

Courts and notoriety

Bodo received support from British law firm Leigh Day, which negotiated a 55 million-pound pollution settlement with Shell in 2015. Leigh Day said it agreed to freeze a separate case to force a cleanup via British courts in order to give the BMI a chance.

Ogoni, the wider area in which Bodo sits, was the subject of a 2011 U.N. Environment Program report warning of catastrophic pollution in the soil and water.

King Emere Godwin Bebe Okpabi of the Ogale community is on the board of a wider Ogoni cleanup effort, and is optimistic its own cleanup, due to start next year, will work. But he fears it will not replicated elsewhere without another marathon battle in the London courts.

"The only place you can get legal success is the international courts," he said.

Under Nigerian law, oil companies must begin cleaning up any spill within 24 hours. But the remoteness of spills and lax enforcement mean this rarely happens.

Ferdinand Giadom, a lecturer at the University of Port Harcourt and technical adviser to the Bodo cleanup, said communities often block cleanups in the hopes of cash settlements. Even in Bodo, works were delayed by two years because of local infighting.

Shell said most oil spills last year were the result of sabotage or theft for illegal refining. It also said that communities block access to sites, making cleaning more difficult.